diff --git a/Source/GSString.m b/Source/GSString.m
index fa5bfa520..fb281a1b8 100644
--- a/Source/GSString.m
+++ b/Source/GSString.m
@@ -48,6 +48,10 @@
 
 #import "GSPrivate.h"
 
+#ifdef HAVE_ALLOCA_H
+#include <alloca.h>
+#endif
+
 /* memcpy(), strlen(), strcmp() are gcc builtin's */
 
 #import "GNUstepBase/Unicode.h"
diff --git a/Source/NSException.m b/Source/NSException.m
index 1b4a4eb86..c2b066b1c 100644
--- a/Source/NSException.m
+++ b/Source/NSException.m
@@ -40,6 +40,10 @@
 #import "Foundation/NSValue.h"
 #import "GNUstepBase/NSString+GNUstepBase.h"
 
+#ifdef HAVE_ALLOCA_H
+#include <alloca.h>
+#endif
+
 #include <stdio.h>
 
 #ifdef HAVE_BACKTRACE
diff --git a/Source/NSMethodSignature.m b/Source/NSMethodSignature.m
index 23f274eb4..1e5d4de17 100644
--- a/Source/NSMethodSignature.m
+++ b/Source/NSMethodSignature.m
@@ -36,6 +36,10 @@
 
 #import "GSInvocation.h"
 
+#ifdef HAVE_ALLOCA_H
+#include <alloca.h>
+#endif
+
 /* The objc runtime library objc_skip_offset() is buggy on some compiler
  * versions, so we use our own alternative implementation.
  */
diff --git a/Source/NSString.m b/Source/NSString.m
index 88e5071bb..9a22329e9 100644
--- a/Source/NSString.m
+++ b/Source/NSString.m
@@ -88,6 +88,10 @@
 #include <stdio.h>
 #include <wchar.h>
 
+#ifdef HAVE_ALLOCA_H
+#include <alloca.h>
+#endif
+
 #import "GNUstepBase/Unicode.h"
 
 #import "GSPrivate.h"